My mom has a beautiful Peace Lily that she's had for about 2 months now (its a recent addition from Grandma). And its been a beautiful plant. During the past week, the tips of his leaves started to turn brown, and they look like they're burnt. I thought that maybe it was getting some direct sunlight, and the leaves didn't like it, but the leaf problem is on almost every leaf, even the ones that are up against the wall. The burnt spots seem to be slowly growing from the tips of the leaves inward. Before I do anything, I wanted to check with you guys.

Just some background on him for you guys: I water him when the leaves start to droop a lil bit (about once every two weeks). And according to my mom, it never gets direct sunlight. Please help save him!

OK, I know that I'm not over-watering it, and the pot does drain properly. So I assume its a humidity problem. The heat is on beacuse winter is approaching so that might be doing it. It is nowhere near a vent, so that's good.

I cannot set up a little rock thingy because my dog will end up drinking the water from it. Would misting it be a good alternative? If so, how often?

I ended up putting the whole apparatus on a stand. The water "bath" extends about an inch around the circumference of the planter. Hopefully this will help my Peace Lily. Thank you very much for your help!